ok ho appena iniziato a lavorare su asp.net ed arrivano le prime difficoltà.. potete aiutarmi please???

Messaggio di errore

Parser Error
Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.

Parser Error Message: The server tag is not well formed.

Source Error:


Line 7: <html>
Line 8: <body>
Line 9: <asp:Label id:"lblMessage" runat="server"/> ---rigasegnalata
Line 10: </body>
Line 11: </html>

compilazione:

<%@ Page Language="VB" %>
<script runat="server">
Sub tbMessage_Change(Sender As Object, E As EventArgs)
lblMessage.Text = "Hello " + tbMessage.Text
End Sub
</script>
<html>
<body>
<font size="5">Hi all!!!
</font><hr>


<% Response.Write("Enter convalidation form

") %>
<form runat="server">
Please enter your name:
<asp:textbox id="tbMessage_Change"
runat=server/>
<asp=button id="btSubmit" Text="Submit"
runat=server/>


<asp:label id="lblMessage" font-size="20pt"
runat=server/>
</form>
<body><html>